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Different types of substation

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Substations may be classified according to metering arrangements (MV or LV) and type of supply (overhead line or underground cable).
The substations may be installed:

  • Either indoors in room specially built for the purpose, within a building, or
  • An outdoor installation which could be :

  - Installed in a dedicated enclosure prefabricated or not, with indoor equipment (switchgear and transformer)
  - Ground mounted with outdoor equipment (switchgear and transformers)
  - Pole mounted with dedicated outdoor equipment (swithgear and transformers)
Prefabricated substations provide a particularly simple, rapid and competitive choice.